1. Department of Chemistry, Bar-Ilan University, Ramat Gan 52900, Israel
2. Department of Physics, Manhattan College, Riverdale, New York 10471, United States
3. The Wolfson Applied Materials Research Centre, Tel-Aviv University, Tel-Aviv 69978, Israel
4. Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
5. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel